package com.sky.aspect;


import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 切面类
 */

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    /**
     * 前置通知
     */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        log.info("开始进行自动填充");

        //获取签名
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();//注解的value值
        //获取参数
        Object[] args = joinPoint.getArgs();

        if(args == null || args.length == 0){
            return;
        }

        Object object = args[0];
        LocalDateTime now = LocalDateTime.now();
        Long userId = BaseContext.getCurrentId();


        if(operationType == OperationType.INSERT)
        {
            Method setCreateTime = object.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            Method setCreateUser = object.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            Method setUpdateUser = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            Method setUpdateTime = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);

            setCreateTime.invoke(object,now);
            setCreateUser.invoke(object,userId);
            setUpdateTime.invoke(object,now);
            setUpdateUser.invoke(object,userId);
        }else {
            Method setUpdateUser = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            Method setUpdateTime = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            setUpdateTime.invoke(object,now);
            setUpdateUser.invoke(object,userId);
        }
    }

}
